I think the performance that Vettel is showing or mistakes under pressure that he's showing are what is going to driver the Scuderia to bring Mick Schumacher into the fold sooner than later.
Look at this quote from Mattia Binotto
Maybe it's that passion and drive that they need. Michael transformed Ferrari with personnel and with his drive and maybe Mick can do the same."I don't think he's looking very similar to Michael but the way he's behaving is very similar," Binotto, who worked closely with the champion during a golden era at Ferrari that ended in 2006, told reporters at the Chinese Grand Prix on Friday."The way he approaches the exercise and the way he's interested in the car, discussing it with the technicians," he added.
"So even in Maranello, you are looking after him but he's always in the workshop looking at the car, speaking with the mechanics, and I think that's very similar to his father."